Outdoor Products 3 Pack Ultimate Dry Sack – Dry sacks designed to protect the contents from the elements. The Outdoor Products Ultimate Dry Sack comes in a 3-pack so you’ll have the right size on hand to protect your gear.Polyurethane coated with watertight, double-stitched, tape-sealed seams for waterproofing. Polyurethane-coated fabric combines with a watertight roll top closure and taped seams to keep water out (not intended for full submersion). Double stitched with watertight taped seams. Roll top allows maximum compression.